package huajiu_com_weixinproject.weixin_project;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class FileUploadServlet extends HttpServlet{
	private static final long serialVersionUID = -7744625344830285257L;
	 private ServletContext sc;
	 private String savePath;
	 
	 public void doGet(HttpServletRequest request, HttpServletResponse response)
	 throws ServletException, IOException {
	 doPost(request, response);
	 }
	  
	 
	 public void init(ServletConfig config) {
	 // 在web.xml中设置的一个初始化参数
	 savePath = config.getInitParameter("savePath");
	 sc = config.getServletContext();
	 }
	  
	 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	 request.setCharacterEncoding("UTF-8");
	 DiskFileItemFactory factory = new DiskFileItemFactory();
	 ServletFileUpload upload = new ServletFileUpload(factory);
	 try {
	 List items = upload.parseRequest(request);
	 Iterator itr = items.iterator();
	 while (itr.hasNext()) {
	 FileItem item = (FileItem) itr.next();
	 if (item.isFormField()) {
	  System.out.println("表单参数名:" + item.getFieldName() + "，表单参数值:" + item.getString("UTF-8"));
	 } else {
	  if (item.getName() != null && !item.getName().equals("")) {
	  System.out.println("上传文件的大小:" + item.getSize());
	  System.out.println("上传文件的类型:" + item.getContentType());
	  // item.getName()返回上传文件在客户端的完整路径名称
	  System.out.println("上传文件的名称:" + item.getName());
	 
	  File tempFile = new File(item.getName());
	 
	  //上传文件的保存路径
	  File file = new File(sc.getRealPath("/") + savePath, tempFile.getName());
	  item.write(file);
	  request.setAttribute("upload.message", "上传文件成功！");
	  }else{
	  request.setAttribute("upload.message", "没有选择上传文件！");
	  }
	 }
	 }
	 }catch(FileUploadException e){
	 e.printStackTrace();
	 } catch (Exception e) {
	 e.printStackTrace();
	 request.setAttribute("upload.message", "上传文件失败！");
	 }
	 request.getRequestDispatcher("/uploadResult.jsp").forward(request, response);
	 }
}
